Water cooler



FIG. 1 is a front perspective view of a water cooler showing my new design;

FIG. 2 is a front view in elevation thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is an opposite side elevational view to that of FIG. 3 thereof; and,

FIG. 7 is a rear elevational view thereof.

The broken line showing of a water bottle in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for water cooler, as shown and described. 